The "other" in the question implies that you already have some ways. Without knowing what they are, it is not possible to ensure that my answer is in terms of other and does not simply repeat the ones you already know.
64 can be written as a product of two factors in the following ways: 1 x 64, 2 x 32, 4 x 16, and 8 x 8.
The number of different ways you can write a number as a product of two whole numbers depends on the number itself and its factors. For example, if the number is a prime number, it can only be written as a product of itself and 1. If the number is a composite number, it can be written in multiple ways based on its prime factors.
28 can be written as a product of factors in the following ways: 1 x 28 = 28 2 x 14 = 28 4 x 7 = 28 -1 x -28 = 28
As a product of its prime factors it is: 3*5 = 15 Or as: 1*15 = 15
1*9, 2*4.5
They are: 1*18 = 18, 2*9 = 18 and 3*6 = 18
15
3*5*23
As a product of its prime factors: 2*47 = 94
12 can be written as 3 x 4 or 2 x 6
1x144,2x72
The number of different ways you can write a number as a product of two whole numbers depends on the number itself and its factors. For example, if the number is a prime number, it can only be written as a product of itself and 1. If the number is a composite number, it can be written in multiple ways based on its prime factors.
28 can be written as a product of factors in the following ways: 1 x 28 = 28 2 x 14 = 28 4 x 7 = 28 -1 x -28 = 28
As a product of its prime factors: 2*47 = 94
As a product of its prime factors it is: 3*5 = 15 Or as: 1*15 = 15
As a product of its prime factors: 3*3*13 = 117 or as 3^2*13 = 117
3x3 9x1
3x3 9x1